238 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



Sphaerocera (JParasphaerocera) annulicornis Malloch 



Sphaeroccra annulicornis Malloch, 1913, Proc. U.S. Nat. Mus., vol. 44, p. 363. 



I have one female of this species (Missouri: Shrewsbury, Aug. 17, 

 1949, W. Downes, received from Mr. Curtis W. Sabrosky). It seems 

 to agree with Malloch's description. 



Female. Black; antennae brown; legs black, apices of femora, 

 tibiae, and tarsi somewhat paler. Abdomen with two small trans- 

 verse, laterally pointed pale spots, about half as wide as the tergites, 

 and posterior one as long as width of hindfemur, anterior one not so 

 long. Length nearly 3.0 mm. 



Facial plate nearly fiat, trapeziform. Hindtibia with no spur, 

 femora slightly thickened. Prosternum with a very transverse 

 posterior area, anterior extension short, almost linear. Tergite 5 

 separated from 4 by a wide white membrane, transverse, forming a 

 somewhat curved, hoodlike cover to the fifth sternite; sternites 1+2 

 very transverse, subcrescentic, about half as wide as abdomen, 

 bearing two longish bristles; sternites 3 and 4 not sclerotized; sternite 

 5 transversely subcrescentic, fitting closely against the tergite. 



Sphaerocera iParasphaerocera) flavicoxa Malloch 



Sphaerocera flavicoxa Malloch, 1925, Proc. Ent. Soc. Washington, vol. 27, p. 121. 



I have one male paratype of this species (Costa Rica: San Mateo, 

 Higuito, Pablo Schild, received through Mr. Sabrosky). It is allied 

 to S. pallipes Malloch, but the facial plate is much more transverse. 



Female. Black; antennae brown, legs pale yellow brown. Abdo- 

 men with two very small transverse pale spots, the first hardly 

 traceable, the second one-fifth the width of the abdomen and hardly 

 as long as basal width of hindtibia. Length somewhat more than 

 2.0 mm. 



Facial plate flat, forming a very transverse small triangle with its 

 sides somewhat concave. Hindtibia with a very small black antero- 

 ventral spur, femora slightly thickened. Prosternum with a trans- 

 verse posterior area and a short linear anterior extension. Fifth 

 tergite transverse, posterior margin nearly straight. Sternites 1+2 

 represented by dots at extreme sides and a transversely oval central 

 plate about as wide as hindfemur; sternite 3 subtrapeziform with 

 anterior margin straight, sides slightly concave, posterior margin 

 somewhat rounded, half as wide again as 1+2, transverse, about one 

 and one-half times as broad in the middle as long; sternite 4 sub- 

 rectangular, nearly twice as broad as long; sternite 5 slightly visible, 

 very transverse; genitalia rather large, tergite 9 not emarginate 

 to receive the cerci, which are separated by a narrow U-shaped 

 emargination. 



